Datatypes to serialize:
-----------------------

flags  (on/off)
ints (8/16/32)
strings
arrays of ints


Ramblings:
----------

Need to do in two passes:  Once to get setup flags, and once after 
everything registers itself.  cfg first registers the flags it needs 
to save, calls the deserializer to set them, and then continues init.
Once all the periphs have been registered, it should run the 
deserializer again to populate the objects.

Objects that get serialized can be flagged as "mandatory," "optional,"
or "informative."  The "informative" objects are dumped for the purpose
of examining the internal state of jzIntv, but are not restored when 
reloading.  The deserializer checks that all mandatory-flagged objects
get restored.

Nicety:  jzIntv should come up paused after a deserialization.

Need to be able to serialize/deserialize multiple times in one jzIntv 
session to allow save/load while playing a game.  For this reason, it
probably makes sense to flag some objects as "init-only" or "verify
against init" since we can't rerun cfg once we're live.  (Architecture
limitation.)  The verify-against-init property should allow us to 
not load save-states that are incompatible with the configuration we're
currently running.